2019-10-10 商品详情cpu飚高问题

依赖的api加了个类，商品详情找不到这个类

会一直反射这个找不到的类，qps高的情况下会对性能造成影响，现象是，ygc频繁且每次ygc时间有几百ms

public Deserializer getDeserializer(String type)
            throws HessianProtocolException {
        if (type == null || type.equals(""))
            return null;

        Deserializer deserializer;

        if (_cachedTypeDeserializerMap != null) {
            deserializer = (Deserializer) _cachedTypeDeserializerMap.get(type);

            if (deserializer != null)
                return deserializer;
        }


        deserializer = (Deserializer) _staticTypeMap.get(type);
        if (deserializer != null)
            return deserializer;

        if (type.startsWith("[")) {
            Deserializer subDeserializer = getDeserializer(type.substring(1));

            if (subDeserializer != null)
                deserializer = new ArrayDeserializer(subDeserializer.getType());
            else
                deserializer = new ArrayDeserializer(Object.class);
        } else {
            try {
                Class cl = Class.forName(type, false, _loader);
                deserializer = getDeserializer(cl);
            } catch (Exception e) {
                log.warning("Hessian/Burlap: '" + type + "' is an unknown class in " + _loader + ":\n" + e);

                log.log(Level.FINER, e.toString(), e);
            }
        }

        if (deserializer != null) {
            if (_cachedTypeDeserializerMap == null)
                _cachedTypeDeserializerMap = new ConcurrentHashMap(8);

            _cachedTypeDeserializerMap.put(type, deserializer);
        }

        return deserializer;
    }